Actaully, it can set of the hand held metal detectors. Its all about changes in the magnetic field that the hand wand generates. That being said, my ear rings or my zipper can set it off as well. It all depends on how competent the person using the hand wand is, and if they have been properly trained to use it. Most aren't properly trained.

i know im late to respond, but from what ive learned... metal detectors operate primarily on magnetism so with that being said you just have to avoid having any piercings containing or made from iron, nickel, or cobalt.

thats why all those stainless steel machetes that people hide in their rectums go unnoticed at the airports!